Add iceberg $properties system table

Cherry-pick of trinodb/trino@8abb12f

Co-Authored-By: Victoria Bukta <victoria.bukta@shopify.com>

presto-iceberg/src/main/java/com/facebook/presto/iceberg/IcebergAbstractMetadata.java

@@ -134,6 +134,8 @@ protected Optional<SystemTable> getIcebergSystemTable(SchemaTableName tableName,
                 return Optional.of(new ManifestsTable(systemTableName, table, snapshotId));
             case FILES:
                 return Optional.of(new FilesTable(systemTableName, table, snapshotId, typeManager));
+            case PROPERTIES:
+                return Optional.of(new PropertiesTable(systemTableName, table));
         }
         return Optional.empty();
     }

presto-iceberg/src/main/java/com/facebook/presto/iceberg/PropertiesTable.java

@@ -0,0 +1,83 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.facebook.presto.iceberg;
+
+import com.facebook.presto.common.Page;
+import com.facebook.presto.common.predicate.TupleDomain;
+import com.facebook.presto.iceberg.util.PageListBuilder;
+import com.facebook.presto.spi.ColumnMetadata;
+import com.facebook.presto.spi.ConnectorPageSource;
+import com.facebook.presto.spi.ConnectorSession;
+import com.facebook.presto.spi.ConnectorTableMetadata;
+import com.facebook.presto.spi.FixedPageSource;
+import com.facebook.presto.spi.SchemaTableName;
+import com.facebook.presto.spi.SystemTable;
+import com.facebook.presto.spi.connector.ConnectorTransactionHandle;
+import com.google.common.collect.ImmutableList;
+import org.apache.iceberg.Table;
+
+import java.util.List;
+
+import static com.facebook.presto.common.type.VarcharType.VARCHAR;
+import static java.util.Objects.requireNonNull;
+
+public class PropertiesTable
+        implements SystemTable
+{
+    private final ConnectorTableMetadata tableMetadata;
+    private final Table icebergTable;
+
+    public PropertiesTable(SchemaTableName tableName, Table icebergTable)
+    {
+        this.icebergTable = requireNonNull(icebergTable, "icebergTable is null");
+
+        this.tableMetadata = new ConnectorTableMetadata(requireNonNull(tableName, "tableName is null"),
+                ImmutableList.<ColumnMetadata>builder()
+                        .add(new ColumnMetadata("key", VARCHAR))
+                        .add(new ColumnMetadata("value", VARCHAR))
+                        .build());
+    }
+
+    @Override
+    public Distribution getDistribution()
+    {
+        return Distribution.SINGLE_COORDINATOR;
+    }
+
+    @Override
+    public ConnectorTableMetadata getTableMetadata()
+    {
+        return tableMetadata;
+    }
+
+    @Override
+    public ConnectorPageSource pageSource(ConnectorTransactionHandle transactionHandle, ConnectorSession session, TupleDomain<Integer> constraint)
+    {
+        return new FixedPageSource(buildPages(tableMetadata, icebergTable));
+    }
+
+    private static List<Page> buildPages(ConnectorTableMetadata tableMetadata, Table icebergTable)
+    {
+        PageListBuilder pagesBuilder = PageListBuilder.forTable(tableMetadata);
+
+        icebergTable.properties().forEach((key, value) -> {
+            pagesBuilder.beginRow();
+            pagesBuilder.appendVarchar(key);
+            pagesBuilder.appendVarchar(value);
+            pagesBuilder.endRow();
+        });
+
+        return pagesBuilder.build();
+    }
+}

presto-iceberg/src/main/java/com/facebook/presto/iceberg/TableType.java

@@ -21,4 +21,5 @@ public enum TableType
     MANIFESTS,
     PARTITIONS,
     FILES,
+    PROPERTIES,
 }

presto-iceberg/src/test/java/com/facebook/presto/iceberg/TestIcebergSystemTables.java

@@ -173,6 +173,15 @@ public void testFilesTable()
         assertQuerySucceeds("SELECT * FROM test_schema.\"test_table$files\"");
     }
 
+    @Test
+    public void testPropertiesTable()
+    {
+        assertQuery("SHOW COLUMNS FROM test_schema.\"test_table$properties\"",
+                "VALUES ('key', 'varchar', '', '')," + "('value', 'varchar', '', '')");
+        assertQuery("SELECT COUNT(*) FROM test_schema.\"test_table$properties\"", "VALUES 1");
+        assertQuery("SELECT * FROM test_schema.\"test_table$properties\"", "VALUES ('write.format.default', 'PARQUET')");
+    }
+
     @AfterClass(alwaysRun = true)
     public void tearDown()
     {